Numerical modeling of the temperate distribution in a commercial hazardous waste slagging rotary kiln

Article Abstract:

A computational fluid dynamics-based (CFD-based) reacting flow model is useful in determining the gas, wall, and bed temperatures in a hazardous waste slagging rotary kiln, especially at limiting conditions. The peak bed temperatures, axial temperature profile and the gas temperature at the exit-plane obtained using the model are similar to the measurements gathered at a waste incinerator during normal operation. The model and the field data both show that the peak temperature is achieved near the middle of the kiln and that the inlet flows determine the interval between the peak temperature and the exit-plane gas temperature.

Fuel-Fired Kilns, Fluid dynamics, Kilns

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Three-dimensional numerical modeling of a field-scale rotary kiln incinerator

Article Abstract:

A steady-state numerical model of a field-scale, direct-fired, rotary kiln incinerator considers radiation and soot in the heat transfer analysis, switches to an adiabatic kiln wall boundary condition and includes a more accurate geometry and improved fitting grid. It builds on work earlier undertaken at Louisiana State University (LSU). Changes incorporated into the model enhance agreement with data from a field-scale rotary kiln by up to two orders of magnitude than models earlier developed at LSU.

Incineration, Hazardous wastes

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A three-dimensional detailed numerical model of a field-scale rotary kiln incinerator

Article Abstract:

The utilization of a three-dimensional detailed numerical model to study the existing temperature and flow field in a field-scale rotary kiln incinerator is discussed. The effects of buoyancy and other opertional parameters were determined by a parametric study. Baseline cases were used to compare and contrast the results. It was found that gas-phase mixing is not greatly affected by turbulence air preheating.

Methods

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